Effect of acoustic frequency and power density on the aqueous ultrasonic-assisted extraction of grape pomace (Vitis vinifera L.) - A response surface approach

Aqueous ultrasound-assisted extraction (UAE) of grape pomace was investigated by Response Surface Methodology (RSM) to evaluate the effect of acoustic frequency (40, 80, 120kHz), ultrasonic power density (50, 100, 150W/L) and extraction time (5, 15, 25min) on total phenolics, total flavonols and ant...

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Veröffentlicht in:	Ultrasonics sonochemistry 2014-11, Vol.21 (6), p.2176-2184
Hauptverfasser:	GONZALEZ-CENTENO, María Reyes, KNOERZER, Kai, SABAREZ, Henry, SIMAL, Susana, ROSSELLO, Carmen, FEMENIA, Antoni
Format:	Artikel
Sprache:	eng
Schlagworte:	Antioxidants - isolation & purification Chemical Fractionation - methods Chemistry Exact sciences and technology Flavonols - isolation & purification General and physical chemistry Models, Theoretical Phenols - isolation & purification Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Solvents - chemistry Sonication - methods Time Factors Ultrasonic chemistry Vitis - chemistry Water - chemistry
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Beschreibung
Zusammenfassung:	Aqueous ultrasound-assisted extraction (UAE) of grape pomace was investigated by Response Surface Methodology (RSM) to evaluate the effect of acoustic frequency (40, 80, 120kHz), ultrasonic power density (50, 100, 150W/L) and extraction time (5, 15, 25min) on total phenolics, total flavonols and antioxidant capacity. All the process variables showed a significant effect on the aqueous UAE of grape pomace (p
ISSN:	1350-4177 1873-2828
DOI:	10.1016/j.ultsonch.2014.01.021